Arch-plate.



F. B. BIGELOW.

ARCH PLATE. APPLICATION FILED ocT.1, 1910.

Patented May' 14, 11312.

2 SHEETS-SHEET 1.

F. B. BIGELOW.

ARCH PLATE.

APPLIGATION'PILBD 00T. v1, 1910.

1,026,645. Patented May 14, 1912.

l 2 SHEETS-SHEET 2.

aa ik? l l l` .-a/ wk I 1 un 1 fwuambofo az/@WW 25M/' l d /1/ cation, referenceflbeing had lt UNITED STATFS PAEENT OFFlCE.

FRANK n. BIGELow, pr' Dnraorr, mcHIeAN, AssIGNon 'ro-MUarHY'IaoN WORKS; or pnrnorr, niemeer, A .coaroaarion or MICHIGAN. f

Alton-PLATE.

Be it known that I, FRANK B`. Bienww, a citizen of the United States of America, residing at Detroit-,inthe county of Wayne and State of Michigan, have invented'certain new and useful Improvements in Arch- Plates,of which the followin is a 'specifierein to the accompanying drawings. i I

This invention .relates toan 'arch plate for furnaces and morepart-icularly to an arch plate adapted to form one wall et 'the coal ma azine of an automatic Stoker:

he object of this invention is to provide ian arch plate furthe purpose so constructed that the lower end thereof which is exposed to extreme heat in thefurnace and liable to become cracked, warped or burned out, may

be quicklyandreas-ily renewed without' tear` ing dover? or in any way disturbing the arch or any through the coal magazine. A further object of the invention is to provide certain .other new and luseful fea'- tures in the construction and arrangement of parts, Aall as hereinafter more fully described andparticularly pointed outv inthe the -accom-` claims reference being had .to panying drawings in which,

Figure 1 is a perspective tion of an automatic stoker showing an` arch plate in place therein embodying the invention; Fig. 2 is a transverse vertical-section through such furnace; Fig; 3 is a perspective detail of a portion ofA the. arch plate showin the same in section and `some of the detacha le sections removed; Fig. 4 is, -a transverse vertical section through'thefarch plate; and 5 is a perspective View of one of the detachable sections. v

For the purpose of illustration the arch platel is shown embodied in a particular construction of automatic stoker, but-it is obvious that it may be adaptedfor .uselin any furnace having a coal magazine.'

As shown in Figs. 1 and 2, 1 areinclined grate bars supported at their lower ends upon a grate bearer 2 with their upper ends resting against coking plates 3 over whichv coal frommagazines 4 above, is shoved by the Stoker boxes 5 actuated by segments on rock shafts 6, all constructed and arranged henpart of the furnace, said p0r-v tion of the archj plate `beingv renewableI detail of ya porf The upper edge ofeach= in place'by its'engagement with a groove 1n as in the common and well known forms of automatic stokers. v

The inner side of each of the coal magazines 4 is formed by an archv plate 7` embodying this invention; This arch plate -comprises a casting 8 extending the full length of the furnace and it is formed'with laterally extending inclined portions 9 and 10 .forming skew seats forarches-ll and 12 .whichspring over the lire vchamber from the'coal magazine extending along one side ofthe furnace to the magazine atthe other y -s1de, with a space 13 betweenthe arches.

This arch seat casting is strengthened by 'Vertical ribs or webs 14 at intervals throughoutf'its length, and a. horizontalrib 15, ex- .tendig inward from the Wall of theicasting a short distance lbelow the archseati9. The wall of the' casting is also formed with `a series of openings 16 below the rib Y15 and between the webs 14,- said openingsforming .outlets for the air from the space 13 between the arches. The upper straight `vertical portionl 17 of .the Acasting 8 forms part of a verticalsidewall ,forv the magazine'iet ano. this vertical wall for' the 'magazineis com pleted by a series of detachable sections or plates 18 which engage the inner tedges of the webs 14 at ltheir' ends and are formed throat of the magazine.- These several sections are' securely and detachably held in yplace by a stud 20' on each ofthe ribs 14 to engage notches 21 in the end'sQof the plates andV each platefintermediate its ends is formed with a hole to receivea bolt 22 y'which is screwthreaded i at 'its inner end' to 4engage a screwthreaded opening 23 lnthe wall of the casting 8.

the main casting 8, formed a projecting;` rib 27 thereon.. Each. of the "sections 18 1s spaced atl its 'lower-endg from thelowei` endof the casting 8 bye seri-es of spaced ribs or webs 24 cast integral `with the inclined lower end 19 and extendingupwardga-fshort dis tance on the vertical' wallf ofy the section. These ribs 24 extend` beyond the inner edge of the archseat 10 and the first course of bricks or blocks 25 .of the arch 12 are formed Patented May 14,1912.

. lwith a laterally extending "angular lower v 4end 19 extendingjbeneath the varch seat 10 and forming the upper side of the discharge section, is" held Asa downward over the edge of the arch seat and engage the ends of the ribs 24. These ribs thus form between them together with the webs 14, a series of air passages Q6 communicating at their upper ends through the openings 16 with the space be tween the arches 11 and 12 and opening at their inner ends along the inner lower edge of the lower arch directly above the coking plate. The inner edge of the arch 'seat 10 is thus protected by the fire brick of the archv and the circulation of air through the air passages prevents said seat from being warped or burned out by'extreme heat. Each section 18 is secured intermediate its ends t6 the arch-seat member by a single boltand is held at its edges bythe studs 20 and ribs 27. Said sections are therefore free to expand and contract independently of each other and of the arch-seat member, and all warping or cracking of the parts due to unequal expansion or contraction is prevented. I

When the protecting ends of the detachto extend able sections which extend beneath the lowerarch seat become burned out by the extreme heat, any one of these sections may be quickly andeasily detachedl and removed and a new one put in its place,-as access may be had to the bolts 22 throu h the coal magazine and the plates may e detached and removed through said turbing the arches or any other part of the furnace. It is obvious that the protecting portion of the arch plate may be made in one piece, but in that event it could not be as readily removed through the magazine,

and it is therefore preferably made 1n dei tachable' sections.

Having thus fully described my invention p what I claim is :--4

1.-' The combination of a coal magazine having an arch seat member forming one side thereof and provided with a seat for an arch, an arch engaging said seat, a removable protecting member having a portion forming a vertical side wall of the magazine and a portion extending outwardly beneath the said arch seat,l said protecting member being spaced from said arch seat to form an air passage between them, and means on the arch seat member for attaching the protecting member thereto and permitting a movement thereof relative'to the arch seat member upon'expansion or contraction of .said members.

2. The combination of a coal magazine having an arch seat member formed with laterally extending arch seat portions spaced apart and connected by a wall, arches engaging said seat portions, a removable protecting member formed with a portion forming a plane side wall of the magazine and a 'portion extending laterally beneath the lower arch seat, said protecting member magazine without dis being spaced from said arch seats and their connecting wall to form an air passage between them and said member, and means for detachably attaching said vprotecting member to the arch seat member.

3. The combination of a coal magazine having an arch seat member formin one side thereof and provided with a seat orv an arch, an arch engaging said-seat, a series of protecting members having portions extending beneath the arch seat and portions extending upwardly within .the magazine to form a portion of a side wall thereof, said upwardly extending portions being rovided with notches .in their ends, and stu s on the arch 'seat member to engage the notchesand support said members.

4. An arch plate adapted to formone side of a coal magazine, comprising a member formed wit-hl an arch-seat at one side `and provided with openings above said seat, and a member detachably attached to the other side of said seat member extending beneath said seat and spaced from saidmember to form an air passage communicating with the space above said arch seat through said openings.

5. An arch plateadapted to form one side of a coal magazine, comprising a' member formed with an arch seat at one side, and a member detachably attached to the other side of said seat member extending beneath lsaid seat andformed with a series of ribs for spacing said member from lsaid seat member and forming a series of air passages .between said members extending beneath the Aarch seat.

6. =An arch plate comprisingfa member, lformed with a vertical wall adapted to form a wall of a coal magazine and with an arch seat at one side near-fits lower edgea proy tecting'r'nemberforming a continuation of the wall of said member, havin a portion extending beneath said seat and orming the upper wall of the discharge throat of said magazine, and means for detachably securing said protecting member to said seat member with a space between said members.

7. An arch plate comprising aseat inember formed with a vertical wall adapted to form a portion of one wall of a coal magazine and with a portion extending laterally from the lower end of said wall -ormin a seat for an arch, a protecting mem er formed with a vertical wall vforming a continuation of the wall of said seat member and with a portion extendingv laterally from the lower end of its wall projecting beneath the arch seat of said seat member, means for spacing said. members forming a series of air passages between, and means for detachably securing said. protecting member to said seat member.

8.'An arch plate comprising a member formed with a vertical wall adapted to form 'filone wall'f of a coal ma azine and with a laterally. extending portlon forming a seat for'an arch, and aseries of protecting members detachably secured to said members beneath the said-seat and separately removable throlgh the magazine.

n' arch plate comprising an arch supporting member formed with a vertical wall' and a portion extending laterally from the loweredge of said wall formed withnpper and lower spaced arch seats and openings between said seat-s,` a plluality of detachable members each formed with a vertical wall and with a'portion extending laterally from'the lower end .of said wall beneath the lower arch seat, ribs on they laterally extending portion of eachy detachable member for spacing said members from said supporting tendingV la'trallyb v said walland Vforming a skew seat for an extending laterally from the lower end of v member and'forming a series of air passages beneath the lower arch seat, sald serles of openings in saidv supporting member` forming inlets for said passages, and means for detachably -secl'lringisaid detachable members to said supporting member.

10J-An arch plate comprising a member formed-with a in'artical Wall, a portion ex- `from the lower end of arch, Ia connecting wall extending downward from the edge of said seat, a port-ion v a series of parallel ribs said connecting wall and forming a skew seat for a lower arch, and vertical webs pro jecting from the lower surfaces of said portions forming the arch seats and said connecting wall; a series of detachable members Y each formed with .a vertical wall and a por- .tion extending laterally from thereto and extending beneath said seat,-

said protecting member being formed with engaging the lower side of said laterally extending portion and extending beyond the edge .thereof toengage bricks of the arch seated upon said seat and form a series of air tween said members.

In testimony whereof I atlix my' signature in presence of two witnesses. p y FRANK B; BIGELOW.

Witnesses:

W. V. MCALIJSTER, M. M; CONRAD.

passages bef 

